What are the main reasons why cars don't catch fire when the weather is cold in winter?

In the north, especially in the northeast, due to the cold weather in winter, it is sometimes difficult to start the car at night or for a long time, so it is difficult to start it smoothly for a period of time. So why is this happening? How to deal with it?

1. The battery is low in winter

We often find that the battery is not very durable in winter. That's because the battery is lead-acid battery, because the discharge time of lead-acid battery is related to temperature. The lower the temperature, the shorter the discharge time. The power consumption of automobile batteries is much larger than that in other seasons. Therefore, in order to maintain the power supply in winter, the electrical equipment in the car should be disabled after parking, so as to avoid the difficulty of starting the next day.

2. air intake system failure

the serious blockage of the air filter in the air intake system makes the air intake insufficient, which leads to the abnormal air mixing ratio of the automobile, which is one of the most common and typical phenomena that makes it difficult to start the automobile in winter. In this case, the engine will normally ignite, but it will not start. In addition, if the throttle, intake valve or idle motor is too dirty, it will be difficult to start. If the valve is too dirty, too much carbon will be deposited in the rear of the intake valve and the intake pipe, and gasoline will be injected to the rear of the valve. Carbon is adsorbed, so that the injected gasoline is adsorbed by carbon deposits and cannot enter the combustion chamber, so it is impossible to drive the car. Usually, cleaning can solve the problem.

3. The exhaust pipe is frozen and blocked

This situation mainly occurs in vehicles with low frequency of use and short distance driving, resulting in the water vapor after engine combustion freezing at the muffler of the exhaust pipe. The damage of three-way catalysis may also cause start-up difficulties. The above two situations belong to unclean exhaust gas. In addition, the low cylinder pressure caused by the poor closing of the exhaust valve in the exhaust system may also lead to difficulties in starting.

4. The oil flow rate slows down

The temperature is low in winter, especially in some northern cities. The viscosity of engine oil will increase with the decrease of temperature, which will slow down the flow rate of engine oil and increase the resistance of engine, thus making it difficult for the car to start. In this case, you need to carry out professional winter maintenance and change the oil suitable for the local climate.

5. Too much carbon deposit

The lower the temperature, the greater the amount of oil required for cold start. Because the surface of carbon deposit is similar to sponge, it is not firm and loose. The fuel sprayed during the initial start-up process will be absorbed by the carbon deposit and cannot completely enter the cylinder. Can't reach the proportion of fire. Once ignited, the burning oil absorbed by carbon deposits begins to evaporate. If the mixed gas is too thick, black smoke will be emitted and the idle speed cannot be increased. In severe cases, the car will go out. With more and more carbon deposition, it is difficult to start.

therefore, when winter comes, it is very practical to carry out comprehensive maintenance, which is also the key to successfully start the engine in winter. Only in this way can we reduce the trouble of driving.